US2903675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Visual display type radio signalling system
Assignee: Individual
•
Filing: 1955-07-06
•
Granted: 1959-09-08
•
Expires: 1975-07-06
Abstract
No abstract record available.
Inventors
- 👤 Curtis L Downey
- 👤 Francis H Chartrey
- 👤 Hugo S Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:20
CPC Classifications
G; G01; G01S; G01S5/00; G01S5/0009
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1702423A
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US1930525A
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US2580453A
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US2475848A
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US2535162A
Cited
US2557581A
Cited
US2764754A
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US2629088A
Cited
US2719284A
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US2740106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |